510(k) · Cleared
ClearedThe Circadia C200 System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Circadia Technologies, Ltd. · DRT Monitor, Cardiac (Incl. Cardiotachometer & Rate Alarm)
Cleared on May 30, 2024 as substantially equivalent to K202464 (Xandar Kardian, Inc., 2021) after a 163-day review. Its family tree reaches back 5 generations to 1983. 2 later devices descend from it.
- Decided
- May 30, 2024
- Review
- 163 days
- Class
- Class II
- Product code
- DRT
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 5 generations to K830295 (1983). 19 ancestors in all. 2 later devices descend from it, 1 citing it directly.
- Root · 5 generations backK830295 Medilog 9000 SystemOxford Medilog, Inc. · 1983
- 4 generations backK971813 EMBLAFerguson Medical · 1998
- 3 generations backK070375 Earlysense ES-16 SystemEarlysense, Ltd. · 2007
- 2 generations backK082626 PAM 3000Wireless 2000 RF & Uwb Technologies, Ltd. · 2009
- 1 generation backK202464 Vital Sign Monitoring Sensor (Model :XK300)Xandar Kardian, Inc. · 2021
- This deviceK234003 The Circadia C200 SystemCircadia Technologies, Ltd. · 2024
- Descendant · cites it directly · 1 of its ownK252676 The Circadia C300 System (C300)Circadia Health, Inc. · 2026
- Descendant · 2 generations on · 0 of its ownK261286 The Circadia C300 System (C300)Circadia Health, Inc. · 2026
Most influential descendants
Showing 2 of 2 · See allView FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −5 | K830295 | Medilog 9000 System | Oxford Medilog, Inc. | 1983 | — |
| −4 | K971813 | EMBLA | Ferguson Medical | 1998 | — |
| −3 | K070375 | Earlysense ES-16 System | Earlysense, Ltd. | 2007 | — |
| −2 | K082626 | PAM 3000 | Wireless 2000 RF & Uwb Technologies, Ltd. | 2009 | — |
| −1 | K202464 | Vital Sign Monitoring Sensor (Model :XK300) | Xandar Kardian, Inc. | 2021 | — |
| 0 (this device) | K234003 | The Circadia C200 System | Circadia Technologies, Ltd. | 2024 | — |
| +1 | K252676 | The Circadia C300 System (C300) | Circadia Health, Inc. | 2026 | — |
| +2 | K261286 | The Circadia C300 System (C300) | Circadia Health, Inc. | 2026 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1986 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2006 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2026 | 2 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in DRT? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new DRT device
- #1 K252676 The Circadia C300 System (C300)score 15.3 · 6 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K202464 | Vital Sign Monitoring Sensor (Model :XK300)Summary page 4…and Monitoring Devices Review Panel: Cardiovascular 3.0 Predicate Device Trade Name: Vital Sign Monitoring Sensor (K202464) Common Name: Cardiac Monitor Regulation Number: 21 CFR 870.2300 Class:… | 2021 |
| † | K200445 | The C100 Contactless Breathing Monitor | 2020 |
| † | K182030 | Faros Mobile | 2018 |
What descends from it? (2)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K252676 | The Circadia C300 System (C300) | 2026 | 1 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 41 years and passes through 6 companies; a new generation was cleared every 9.8 years on median.
- 1 of the 19 ancestors has a recall of any class.
- Of its descendants, K252676 (Circadia Health, Inc., 2026) has gone furthest, with 1 descendant of its own.
- 2 other devices also cite its predicate K202464.
How does its category compare?
All DRT devicesDRT Monitor, Cardiac (Incl. Cardiotachometer & Rate Alarm): FDA decisions, review times, recalls and adverse event reports over 20 years. 2024, this device’s year, is highlighted.
FDA decisions per year · DRT
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DRT
228in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DRT
1in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DRT
40in 2025
MAUDE reports naming product code DRT, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 1 | — | 0 | 113 |
| 2008 | 1 | — | 0 | 99 |
| 2009 | 6 | 70 | 0 | 118 |
| 2010 | 3 | 44 | 0 | 63 |
| 2011 | 3 | 149 | 1 | 36 |
| 2012 | 1 | — | 0 | 47 |
| 2013 | 1 | — | 0 | 16 |
| 2014 | 0 | — | 0 | 26 |
| 2015 | 1 | — | 0 | 48 |
| 2016 | 1 | — | 0 | 55 |
| 2017 | 1 | — | 0 | 159 |
| 2018 | 1 | — | 0 | 224 |
| 2019 | 1 | — | 0 | 447 |
| 2020 | 0 | — | 0 | 50 |
| 2021 | 2 | — | 1 | 85 |
| 2022 | 1 | — | 0 | 35 |
| 2023 | 1 | — | 0 | 47 |
| 2024 | 3 | 228 | 1 | 29 |
| 2025 | 1 | — | 0 | 40 |
| 2026 | 5 | 120 | 0 | — |
What is it indicated for?
The Circadia C200 System is intended for the measurement of respiratory rate and heart rate, including spot measurement. The system is indicated for adult patients in clinical settings, such as skilled nursing and long-term care facilities. The system is not indicated for active patient monitoring, and does not provide alarms for timely response in acute life-threatening situations. The system is not intended to monitor heart rate in patients with…
Read the full statement (109 words)
The Circadia C200 System is intended for the measurement of respiratory rate and heart rate, including spot measurement.
The system is indicated for adult patients in clinical settings, such as skilled nursing and long-term care facilities.
The system is not indicated for active patient monitoring, and does not provide alarms for timely response in acute life-threatening situations. The system is not intended to monitor heart rate in patients with arrhythmias.
The system is intended to be used by healthcare professionals (HCPs) and data are intended to be reviewed by HCPs to inform patient care.
The system also monitors patient motion, and patient presence or absence near the device (exits).
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K234003 · printed Nov 6, 2026
Cite this page
510(k) Report. “K234003: The Circadia C200 System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K234003
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026